Method for handling a slag pot or ladle and pyrometallurgical tools
OwnerGuillaume Denollininventor
Life of this patent
Estimating the term…
Abstract
A method is shown for handling a slag pot or ladle and pyrometallurgical tools made form steel or cast iron, comprising the steps of spraying a mineral suspension onto a wall and bringing said slag pot or ladle or the pyrometallurgical tool into service, wherein said mineral suspension comprises calcic particles in suspension in an aqueous phase forming a calcic particle milk having a calcic particle content of between 20% and 60% by weight with respect to the weight of said calcic particle milk, said mineral layer being a fine layer.
Claims14
A method for handling a slag pot or ladle being a steel or cast-iron pot or ladle comprising an internal wall and an external wall, said method comprising the steps of:
- a) spraying a mineral suspension on said internal wall, the temperature of said slag pot or ladle being greater than 100° C., so as to line said internal wall with a mineral layer, prior to the steps of:
- b) collecting slag in said slag pot or ladle, lined on its internal wall with said mineral layer, of a pyrometallurgic tool,
- c) transporting said slag pot or ladle from said pyrometallurgic tool to a slag deposition site,
- d) emptying said slag pot or ladle at said slag-deposition site in order to eliminate the slag contained in said pot or ladle,
- e) wherein step a) is performed with the purpose of bringing said slag pot or ladle lined with said mineral layer into service in order to repeat steps b) to d), and
- wherein said mineral suspension comprises calcic particles in suspension in an aqueous phase forming a calcic-particle milk, said calcic particles being chosen from the group consisting of slaked lime, at least partially slaked decarbonated dolomite, limestone and mixtures thereof, the at least partially slaked decarbonated dolomite being obtained from decarbonated dolomite, the decarbonated dolomite having a quick part caused by the release of CO2 during cooking, the at least partially slaked decarbonated dolomite being obtained by adding water in order to hydrate the quick part of the decarbonated dolomite, the mineral suspension having a calcic particle content of between 20% and 60% by weight with respect to the weight of said calcic-particle milk, said calcic particles in the calcic particle milk of said mineral suspension having a mean particle size d50 of between 1.5 μm and 10 μm and wherein said mineral layer is a fine layer coated on the internal wall, the layer having a layer thickness of between 0.1 and 0.5 mm, in which said mineral suspension further comprises additives, selected from the group consisting of carbohydrates, dispersants and fluidifying additives and wherein said dispersants and fluidifying additives are selected from the group consisting of polycarbonates, polyacrylates and polyphosphonates.
A method for lining an internal wall of a slag pot or ladle made from steel or cast iron with a mineral layer of calcic particle milk using a milk, wherein the milk of calcic particles is selected from the group consisting of slaked lime, at least partially slaked decarbonated dolomite, limestone and mixtures thereof, the at least partially slaked decarbonated dolomite being obtained from decarbonated dolomite, the decarbonated dolomite having a quick part caused by the release of CO2 during cooking, the at least partially slaked decarbonated dolomite being obtained by adding water in order to hydrate the quick part of the decarbonated dolomite, in which said calcic particle milk is sprayed to form a fine mineral layer of calcic particles and has a calcic particle content of between 20% and 60% by weight with respect to the total weight of the calcic particle milk, said fine mineral layer of calcic particles having a layer thickness of between 0.1 and 0.5 mm and said calcic particles of said mineral suspension having a mean particle size d50 of between 1.5 μm and 10 μm.
Dependencies are inferred from the claim text.